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CN-122005988-A - Extracorporeal circulation system

CN122005988ACN 122005988 ACN122005988 ACN 122005988ACN-122005988-A

Abstract

The application belongs to the technical field of medical instruments, and particularly relates to an extracorporeal circulation system. The extracorporeal circulation system comprises a first pipe body and a first branch pipe, wherein a first pipe cavity, a second pipe cavity and a third pipe cavity are sequentially formed in the first pipe body along the axial direction of the first pipe body, the radial dimension of the first pipe cavity is larger than that of the second pipe cavity, the radial dimension of the second pipe cavity is smaller than that of the third pipe cavity, a first filter screen is arranged in the second pipe cavity, the first filter screen and the axial direction of the first pipe body form a preset included angle, the first branch pipe is arranged outside the first pipe body, the inlet end of the first branch pipe is communicated with the third pipe cavity, the outlet end of the first branch pipe is communicated with the second pipe cavity, and the outlet end of the first branch pipe is arranged on one side of the first filter screen, which is away from the first pipe cavity, and is arranged opposite to at least part of the first filter screen along the radial direction of the first pipe body. According to the extracorporeal circulation system of the present application, plaque clogging of the first filter screen in blood can be reduced.

Inventors

  • FENG HAOYUAN
  • LI ZHEN

Assignees

  • 深圳市纬康医疗科技有限公司

Dates

Publication Date
20260512
Application Date
20251230

Claims (10)

  1. 1. An extracorporeal circulation system comprising a blood filtration assembly, the blood filtration assembly comprising: The first pipe body is provided with a first pipe cavity, a second pipe cavity and a third pipe cavity in sequence along the axial direction of the first pipe body, the radial dimension of the first pipe cavity is larger than that of the second pipe cavity, the radial dimension of the second pipe cavity is smaller than that of the third pipe cavity, a first filter screen is arranged in the second pipe cavity, and the first filter screen and the axial direction of the first pipe body are arranged at a preset included angle; the first branch pipe, the first branch pipe is located the outside of first body, the entry end of first branch pipe with the third lumen is linked together, the exit end of first branch pipe with the second lumen is linked together, just the radial dimension of first branch pipe is less than the radial dimension of second lumen, the exit end of first branch pipe is located the first filter screen deviates from one side of first lumen, and follows the radial of first body with at least part first filter screen sets up relatively.
  2. 2. The extracorporeal circulation system of claim 1, wherein a second filter is further disposed in the third lumen, the second filter has a mesh size smaller than that of the first filter, and the inlet end of the first branch pipe is disposed on a side of the second filter facing away from the first filter.
  3. 3. The extracorporeal circulation system of claim 1, wherein the first branch pipe is provided with an on-off switch for controlling the on-off of the first branch pipe.
  4. 4. The extracorporeal circulation system of claim 1, wherein a side wall of the second lumen is provided with a seal, the seal is an elastic seal, the outlet end of the first branch tube communicates with the second lumen through the seal, and the outlet end of the first branch tube is configured to be movable within the seal in an axial direction of the first tube body.
  5. 5. The extracorporeal circulation system of claim 1, wherein the second lumen is further provided with a receiving groove provided at a side of the first filter toward the first lumen and disposed near an edge of the first filter.
  6. 6. The extracorporeal circulation system of claim 5, wherein the receiving groove and the outlet end of the first branch pipe are disposed on opposite sides of the second lumen in a radial direction of the first tube body, respectively, and the outlet end of the first branch pipe is disposed opposite to an end of the first filter screen facing the first lumen.
  7. 7. The extracorporeal circulation system of claim 5, wherein the blood filter assembly further comprises a second branch tube, the second branch tube is disposed outside the first tube body, an inlet end of the second branch tube is in communication with the first tube cavity, an outlet end of the second branch tube is in communication with the second tube cavity, a radial dimension of the second branch tube is smaller than a radial dimension of the second tube cavity, an outlet end of the second branch tube is disposed on a side of the first filter screen facing the first tube cavity, and an outlet end of the second branch tube is disposed on the same side of the second tube cavity as an outlet end of the first branch tube along a radial direction of the first tube body.
  8. 8. The extracorporeal circulation system of claim 7, wherein the outlet end of the first branch and the outlet end of the second branch are located on opposite sides of the first filter screen, respectively.
  9. 9. The extracorporeal circulation system of claim 8, wherein the receiving groove is disposed at a bottom of the second lumen and below the first filter, and the outlet end of the second branch pipe and the outlet end of the first branch pipe are both disposed at a top of the second lumen.
  10. 10. The extracorporeal circulation system of any one of claims 1, further comprising a flow adjustment assembly in communication with the first lumen, the flow adjustment assembly configured to adjust a blood flow rate within the first lumen.

Description

Extracorporeal circulation system Technical Field The application belongs to the technical field of medical instruments, and particularly relates to an extracorporeal circulation system. Background The carotid artery is an artery of the neck that provides blood flow to the brain and face. Bifurcation or branching of the carotid artery is a common site of plaque (fat, cholesterol, and other substances) accumulation in the body, leading to stenosis or obstruction. When a portion of the occlusion falls off or the artery is fully occluded, the occlusion can lead to a stroke. The transcervical revascularization procedure (TCAR) is a novel carotid stenting procedure that involves the placement of a retrograde flow system prior to stent implantation, the retrograde flow system having an arterial end and a venous end, the arterial end including a port for occluding arterial blood and the venous end for implantation of a vein and for retrograde blood return to the vein from the common carotid artery, resulting in temporary reversal of blood flow, thereby preventing intraoperative sloughed plaque flow to the brain. During the reflux of blood, plaque in the blood may reflux into the body with the blood, resulting in blockage of blood vessels. Disclosure of Invention The invention aims to at least solve the problem of how to reduce plaque from flowing back into the human body along with blood. This object is achieved by: the present application provides an extracorporeal circulation system comprising a blood filter assembly comprising: The first pipe body is provided with a first pipe cavity, a second pipe cavity and a third pipe cavity in sequence along the axial direction of the first pipe body, the radial dimension of the first pipe cavity is larger than that of the second pipe cavity, the radial dimension of the second pipe cavity is smaller than that of the third pipe cavity, a first filter screen is arranged in the second pipe cavity, and the first filter screen and the axial direction of the first pipe body are arranged at a preset included angle; the first branch pipe, the first branch pipe is located the outside of first body, the entry end of first branch pipe with the third lumen is linked together, the exit end of first branch pipe with the second lumen is linked together, just the radial dimension of first branch pipe is less than the radial dimension of second lumen, the exit end of first branch pipe is located the first filter screen deviates from one side of first lumen, and follows the radial of first body with at least part first filter screen sets up relatively. According to the extracorporeal circulation system provided by the application, one side of the first tube cavity is taken as the inlet end of the first tube body, the other side of the third tube cavity is taken as the outlet end of the first tube body, the first filter screen is arranged in the first tube body, so that plaque can be accumulated on one side of the first filter screen facing the first tube cavity, the second tube cavity and the third tube cavity with radial size change are sequentially arranged in the first tube body, a Venturi effect is formed in the first tube body, the first branch tube communicated with the third tube cavity and the second tube cavity is arranged, blood in the third tube cavity can flow back into the second tube cavity through the first branch tube, and the outlet end of the first branch tube is opposite to at least part of the first filter screen, so that the blood flowing back by the first branch tube can flush one side of the first filter screen facing away from the first tube cavity, plaque in blood is further reduced, the first filter screen is blocked, and the fluidity of blood in the first tube body is improved. In addition, the extracorporeal circulation system according to the present invention may have the following additional technical features: in some embodiments of the present invention, a second filter screen is further disposed in the third lumen, the mesh size of the second filter screen is smaller than the mesh size of the first filter screen, and the inlet end of the first branch pipe is disposed on a side of the second filter screen facing away from the first filter screen. In some embodiments of the present invention, an on-off switch is disposed on the first branch pipe, and the on-off switch is used to control the on-off of the first branch pipe. In some embodiments of the invention, the side wall of the second lumen is provided with a seal, the seal being a resilient seal, the outlet end of the first branch tube communicating with the second lumen through the seal, and the outlet end of the first branch tube being configured to be movable within the seal in the axial direction of the first body. In some embodiments of the invention, the second lumen is further provided with a receiving groove, and the receiving groove is arranged on one side of the first filter screen facing the fi